Jumping off from Stefan's suggestion...
Consider creating
QuickStyle Sets. This is not as simple as
Themes. It can be more powerful.
Here is a macro that removes all styles from the QuickStyles Gallery. You would then need to add your styles to the Gallery, then save the Style Set.
Code:
Sub StylesQuickStylesOff()
' Charles Kenyon 2018-12-03
'
' This is preparatory to saving a Quick Style Set for only certain styles
' Strips all styles from quickstyles gallery
' Do not run in a document you plan on using because you will want those other standard styles in you gallery
'
Dim aStyle As Style
On Error Resume Next
For Each aStyle In ActiveDocument.Styles
aStyle.QuickStyle = False
Next aStyle
On Error GoTo 0
End Sub
Instructions for Installing Macros from Forums or Websites by Graham Mayor, MVP